function FindProxyForURL(url, host)
    {
        if (isPlainHostName(host) ||
            (dnsDomainIs(host, ".leeds.ac.uk") && isInNet(host, "129.11.0.0", "255.255.0.0")) ||
            isInNet(host, "129.11.0.0", "255.255.0.0") ||
            isInNet(host, "172.16.0.0", "255.240.0.0") ||
            isInNet(host, "10.0.0.0", "255.0.0.0") ||
            isInNet(host, "127.0.0.1", "255.255.255.255")
            )
            return "DIRECT";
        else
	    return   "PROXY www-cache.leeds.ac.uk:3128";
    }